Pen



FIG. 1 is a front view of the pen showing my new design;

FIG. 2 is a rear view of the pen of FIG. 1;

FIG. 3 is a left side view of the pen of FIG. 1;

FIG. 4 is a right side view of the pen of FIG. 1;

FIG. 5 is a top plan view of the pen of FIG. 1;

FIG. 6 is a bottom plan view of the pen of FIG. 1;

FIG. 7 is a front perspective view of the pen of FIG. 1; and,

FIG. 8 is a front perspective view of the pen of FIG. 1, with a pen point in an alternative position. 

The ornamental design for a pen, as shown and described. 